Tunable cw UV laser with <35 kHz absolute frequency instability for precision spectroscopy of Sr Rydberg states.
Tunable cw UV laser with <35 kHz absolute frequency instability for precision spectroscopy of Sr Rydberg states.
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DOI：
10.1364/oe.24.002281
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发表时间：
2015-12
期刊：
影响因子：
3.8
通讯作者：
E. Bridge;N. C. Keegan;A. Bounds;D. Boddy;D. P. Sadler;Matthew P. A. Jones
中科院分区：
文献类型：
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作者：
E. Bridge;N. C. Keegan;A. Bounds;D. Boddy;D. P. Sadler;Matthew P. A. Jones
我们提出了一个固态激光系统，产生超过200 mW的连续波，窄带光，可调谐范围为316.3 nm - 317.7 nm和318.0 nm - 319.3 nm。该激光器基于市售光纤放大器和光学倍频技术，沿着在周期性极化的化学计量比钽酸锂晶体中产生和频。激光频率被稳定到以原子为基准的高精细光学传递腔。使用GPS参考光频梳，我们测量了10（-3）s和10（3）s之间的时间尺度的< 35 kHz的长期频率不稳定性。作为一个应用程序，我们进行光谱的Sr里德堡态从n = 37 - 81，演示24 GHz的无模式跳频扫描。在冷原子样品中，我们测量多普勒限制线宽为350 kHz。
We present a solid-state laser system that generates over 200 mW of continuous-wave, narrowband light, tunable from 316.3 nm - 317.7 nm and 318.0 nm - 319.3 nm. The laser is based on commercially available fiber amplifiers and optical frequency doubling technology, along with sum frequency generation in a periodically poled stoichiometric lithium tantalate crystal. The laser frequency is stabilized to an atomic-referenced high finesse optical transfer cavity. Using a GPS-referenced optical frequency comb we measure a long term frequency instability of < 35 kHz for timescales between 10(-3) s and 10(3) s. As an application we perform spectroscopy of Sr Rydberg states from n = 37 - 81, demonstrating mode-hop-free scans of 24 GHz. In a cold atomic sample we measure Doppler-limited linewidths of 350 kHz.